Valve-grinder.



CHRISTIAN MIKKELSEN, 0F BELOIT, WISCONSIN.

VALVE-GRINDER.

Specification of Letters Patent.

Patented Nov; 13, 191 7.

Application led February 8, 1917. Serial No. 147,421.

To all whom t may concern:

Be it known that I, CHRISTIAN MIKKEL- SEN, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Valve-Grinders and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in valve grinders and the primary object of the invention is to provide a tool of this character that is so constructed that it is especially adapted for use on gas easily placed and operated from various positions that are ordinarily inaccessible to the general type of valve grinders.

Another object of the invention is to provide a valve grinder of this character which is provided with means for changing the position of the valve being ground, without lifting the tool from the valve.

other object of the invention is to provide a valve grinder of this character that limits the rotary movement of the valve by a coacting stop member on the supporting handle of the device, thereby producing the greatest efficiency and better results than if the valve had an unlimited rotary movement.

Another object of this invention is to provide a device of this character which is simple and durable in construction, inexpensive to manufacture, and one which will be very eieient in operation.

With these and numerous other objects in view, my invention consists of the novel features of construction, combination and arrangement of parts which will be herein referred to and more particularly pointed out in the specification and claims.

In the accompanying drawings,

Figure l is a j plan view of the valve grinder with the operating rod in position;

Fig. 2 is a plan view of one end of the grinder showing the operating rod in forward position;

Fig. 3 is a side elevation of the end of the device;

Fig. 4 is a bottom view valve grinder;

Fig. 5 is a vertical section on the line 5 5 of Fig. 2 showing the valve engaging tool in elevation; and

Fig. 6 is a perspective view of the operating rod.

In describing my invention I shall refer to the drawings in which similar reference characters designate corresponding parts throughout the several views. The numeral l designates the supporting handle of the valve grinder which is formed from a straight bar having an enlarged grip portion 2 at one end, while the other end 3- of the same is provided with an opening 4 therethrough. This end 3 of the handle l is formed with a forked portion 5 that eX- tends laterally therefrom and' is bent parallel, the parallel with an opening 6 therethrough that alines with the opening 4 in the main portion of the handle. Y

The handle l is normally positioned and disposed horizontally, and the same isk rovided with a valve engaging tool 7 that has a stem 8 thereon rotatably mounted through the alining openings 1 and 6 in the forked end of the handle. This valve engaging tool is provided with the usual type of projecting lugs 9 on its lower surface and the of the end of the to carry out this function.

circular plate l1 is rigidly secured to the stem 8 of the valve engaging member as shown at l2 between the forks at the end 3 of the handle l. This plate ll is provided with a plurality of openings 13 therethrough adjacent its periphery. A portion of the end 3 of the handle l that is directly above the plate ll as clearly shown in Fig. 2 of the drawings, is enlarged as shown at 14: and being formed substantially oval-shaped and projecting laterally at either side of the handle above the plate. This enlarged portion 14 is adapted to form a projecting stop for a purpose to be hereinafter more fully described.

portion being provided j The valve grinder is opera-ted by means of an operating rod 15 which has a handle or gripping portionvl at one end, while the other end is bent laterally as shown at 17. This laterally bent end of the operating rod is adapted to be positioned in one of the openings 13 of the circular plate l1, so that When the rod is operated the plate ivi'll be rotated, hence grinding the valve.

ln operation, the valve grinder engages the conventional type of valve, in a manner which is obvious. l/Jhen in position the stem ofv the valve engaging tool will project vertically, and owing to the fact that the said stem is rotatably mounted through the forked end of the suppcrting'handle 1 at right'angles to the same, the handle 1 will consequently be positioned horizontally when the tool is in operation. rllhe operating rod l5 is positioned substantially parallel with the handle 1 and laterally spaced therefrom, and the bent end 17 of the rod is adapted to be positioned in one of the openings 13 of the plate. llihen in this position, upon reciprocating the operating rod 15, the stem Will be rotated through the movement imparted to the plate 11 and consequently the valve Will be ground.

During the grindingoperation the movement of the circular plate and consequently the rotary movement imparted to the valve, is limited to a quarter turn ovving to the fact that the operating rod is so positioned that it is engaged by the enlarged stop portion 1st of the handle 1 after the plate has been given a quarter turn in either direction. This stop 1l projects laterally from the handle at either side of the same so that the rod may be used on the plate in either direction. This prevents the valve from rotating freely, and the grinding mixture forming itself in regular lines or grooves Where it Will remain throughout the process, consequently grinding the surfaces of the valve seat excessively in some places and not sufficiently in others. By limiting the movement of the valve to a quarter turn this objection is overcome and the greatest eiiiciency obtained.

Owing to the fact that theV supporting handle 1 of the valve grinder is positioned horizontally, this gri der is adapted to be used in a number of places ordinarily not accessible to the general type of valve grinders. This type of grinder can be placed upon a valve under the dash or body of an automobile and operated as easily as th ugh the valve Were out in the open. Another improved feature of the device is that owing to the fact that the plate 11 is provided with a plurality of openings, and as the operating rod may be connected With any of these openings, the position of the valve can be changed as is required in grinding Without raising the device from the valve orin any Way re-adjusting the tool except to remove the hooked operating handle from one hole in the plate, and placing it in another. This greatly simplifies the operation of the grinder and makes the tool operate much quicker than When it is necessary to remove the device every time it is desired to change the position of the valve.

From the foregoing description of the construction and operation of my improved valve grinder, the manner of applying the same to use, and the operation thereof will be readily understood, and it will bev seen that 1 have provided a simple and etlicient device of this character for carrying out the objects of the invention.

l claim: l

1. A valve grinder of the class described comprising a handle, a valve engaging tool having a stem rotatably mounted in said handle at right angles to the same, a laterally projecting member on said stem, and an operating rod Ydisposed iny substantially parallel relation With the supporting handle and adapted to engage the membe1 to oscillate the stem upon reciprocation of the rod.

2. A valve grinder of the class described comprising a handle, a valve engaging tool having' a stem rotatably mounted in said handle at right angles to the same, a laterally projecting member on said stem, an operating rod disposed lin substantially parallel relation vvith the supporting handle and adapted to engage th-e member to oscillate the stem upon reciprocation of the rod, and means on said handle adapted to engage the operatingrod to limit the movement o' the stem.

A; valve grinder of the class described comprising a handle, a valve engaging tool having a stem rotatably mounted in said handle at right angles to the sam-e, said handle having a laterally projecting enlarged portion adjacent the stem, a plate on the stem, an operating rod disposed in substantially parallel relation to said handle and adapted to loosely engagel the plate at either side ofsaid handle, and the said rod being adapted to strike the enlarged portion of the handle when reciprocated, whereby the rotary movement of the plate is limited to a quarter turn.

a. A valve grinder of the class described comprising a handle bar, a valve engaging tool having a stem rotatably mounted in said handle bar, a plate on the stem, a reciprocating oper ting rod adapted to rotate said plate and disposed in substantially parallel relation with the handle bar, and `coacting means on said rod and plate to detachably and pivotally unite them at various points around the periphery of the plate, whereby the position of the tool may be varied to shift the valve Without moving the handle bar. l

5. A valve grinder of the class described iso comprising a handle bar having one end forked, a valve engaging tool having a stem rotatably mounted through said forked end, a circular plate mounted on said stem be- 5 tween the arms of the forl, said plate having a plurality of transverse openings adja cent said periphery, and an operating rod disposed substantially parallel With the handle bar to be reciprocated, said rod having a 10 laterally bent end adapted to detaohably and pvotally engage one of the openings in the plate to oscillate the plate upon reciprocatory movement of the rod.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit- 15 nesses.

` CHRISTIAN MIKKELSEN. Witnesses:

H. W. ADAMS, ZULA M. VosBUnGH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G. 

